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Characterization of expandable clay minerals in Lake Baikal sediments by thermal dehydration and cation exchange

SYSNO ASEP	0021341
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Characterization of expandable clay minerals in Lake Baikal sediments by thermal dehydration and cation exchange
Title	Charakterizace rozšířených jílových minerálů v usazeninách jezera Bajkal - termální dehydratací a iontovou výměnou
Author(s)	Grygar, Tomáš (UACH-T) Bezdička, Petr (UACH-T)_{SAI, RID, ORCID} Hradil, David (UACH-T)_{RID, SAI} Hrušková, Michaela (UACH-T) Novotná, Kateřina (UACH-T) Kadlec, Jaroslav (GLU-S)_{RID, SAI, ORCID} Pruner, Petr (GLU-S)_{RID, SAI, ORCID} Oberhansli, H. (DE)
Source Title	Clays and Clay Minerals. - : Springer - ISSN 0009-8604 Roč. 53, č. 4 (2005), s. 389-400
Number of pages	12 s.
Language	eng - English
Country	US - United States
Keywords	cation exchange capacity ; Lake Baikal ; Lake Sediments
Subject RIV	CA - Inorganic Chemistry
R&D Projects	IAA3032401 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z40320502 - UACH-T (2005-2011)
Annotation	The sedimentary series from Academician Ridge, Lake Baikal, eastern Siberia, was examined using cation exchange capacity (CEC) to estimate the amount of expandable clay minerals (ECM) and high-temperature X-ray diffraction (HT-XRD) to determine their basic classification. The comparison of the magnetic susceptibility (MS) at sub-millennial resolution and the delta(18)O record of a reference Atlantic core (ODP 980) was used to create an age model. The most closely studied part of the series covered the major part of the last glacial cycle (120-20 ky BP). The HT-XRD analysis is based on monitoring the course of ECM dehydration with 5 degrees C steps between 25 and 250 degrees C and enabled us to improve the discrimination between ECM, chlorite and micas. The CEC obtained at millennial resolution showed that the neoformation of ECM in warmer periods of the last interglacial was either insignificant or fully compensated by their dissolution or dilution.
Workplace	Institute of Inorganic Chemistry
Contact	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Year of Publishing	2006

Number of the records: 1